SMS short codes are capable of sending extremely high volumes of text messages in a short period of time. This makes them the optimal choice when looking to reach large audiences.
Non-vanity short codes, are just what you may think. When applying for a new code, you have no control over what the number will be.
Vanity short codes, give you the option of choosing what your number will be.
Dedicated short codes, now the only available option, are ones that are used by a single brand or organization only.